Iron is not a problem for vegetarians -- there are many vegetable sources for it, including beets, parsley, dandelion
greens, most green
leafy veggies except lettuce, nettles, etc. The two nutrients hard to get for a vegetarian are L-methionine, an amino acid that's part of protein, and B12. Also keep in mind that not everyone is cut out to be a vegetarian, so watch your energy levels and health. Some people do well that way, some don't -- we're not all the same.